In recent weeks, the SFIO has been asked to investigate a significant number of companies for fraudulent activities, especially those related to diamond merchants Nirav Modi and Mehul Choksi in the Rs 12,700 crore Punjab National Bank fraud.

Last month, the ministry ordered the SFIO to probe around 110 companies and about 10 limited liability partnerships related to Modi and Choksi.

Besides, the white collar crime investigation agency has already questioned various bank officials with regard to the scam.